GN: Do not use forward_dependent_configs_from variable.

webrtc/modules/audio_coding/BUILD.gn

 # Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import("//build/config/arm.gni")
 import("../../build/webrtc.gni")
@@ skipping 691 matching lines @@
   ]
 
   deps = [
     ":audio_encoder_interface",
   ]
 
   if (rtc_build_opus) {
     configs += [ "../..:common_config" ]
     public_configs = [ "../..:common_inherited_config" ]
 
-    deps += [ rtc_opus_dir ]
-    forward_dependent_configs_from = [ rtc_opus_dir ]
+    public_deps = [
+      rtc_opus_dir,
+    ]
   } else if (build_with_mozilla) {
     include_dirs = [ getenv("DIST") + "/include/opus" ]
   }
 }
 
 config("neteq_config") {
   include_dirs = [
     # Need Opus header files for the audio classifier.
     "//third_party/opus/src/celt",
     "//third_party/opus/src/src",
@@ skipping 101 matching lines @@
       deps += [ ":isac" ]
     }
     defines += [ "WEBRTC_CODEC_G722" ]
     deps += [ ":g722" ]
   }
   if (!build_with_mozilla && !build_with_chromium) {
     defines += [ "WEBRTC_CODEC_ILBC" ]
     deps += [ ":ilbc" ]
   }
 }